diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
index 09a44454..63a20b08 100644
--- a/CONTRIBUTORS.md
+++ b/CONTRIBUTORS.md
@@ -440,6 +440,11 @@ Place: Nigeria </br>
 Coding Experience: Python and javaScript. </br>
 Email: tolubarca01@gmail.com </br>
 
+Name: [Amanda Bertsch](https://github.com/abertsch72) </br>
+Place: Arizona, USA </br>
+Coding Experience: Python, C, Java, SQL. </br>
+Email: abertsch72@gmail.com </br>
+
 Name: [Abhishek Singh](https://github.com/n6wbi6) </br>
 Place: India </br>
 Coding Experience: 2 years of coding experience in C and python. </br>
diff --git a/python/unique/abertsch72_unique_strings_in_nested_lists.py b/python/unique/abertsch72_unique_strings_in_nested_lists.py
new file mode 100644
index 00000000..8ff364a7
--- /dev/null
+++ b/python/unique/abertsch72_unique_strings_in_nested_lists.py
@@ -0,0 +1,7 @@
+seqs = [["a","b","c"],["a","d","e","f"],["y","a"],["a","a","a","a"], ["A"]]
+
+print(len(set([name for seq in seqs for name in seq])))
+
+# Testing
+testseqs = [["a","b","c"],["a","d","e","f"],["y","a"],["a","a","a","a"], ["A"]]
+assert (len(set([name for seq in testseqs for name in seq])) == 8)